The 24 bits in the imonkey 24-in-1 Screwdriver Set were carefully selected to cover most of the screws found in the home. The bits are attached to the aluminum alloy case using magnets. The aluminum alloy construction of the bit handle makes it more robust than conventional plastic handles.Designed by: Zhuhai imonkey Technology Co., Ltd.Contact: binyi.liu@imonkey.com.cn